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To the Editor
In recent years, many different kinds of journals have been published
in accordance with the diversity of life science research fields. I sincerely feel grateful that the journal titled
wonderful term “Biomedicine”, which commits in covering broad academic fields,
is launching here in such trend. Medical Biology (Biomedicine) is essentially
read as a science exploring human health from a biological standpoint, and the research
products must be returned to the improvement of human health. Current Biomedicine involves multiple
disciplines being labeled such various kinds of academic names as Cell Biology,
Molecular Biology, Biochemistry, Immunology, Laboratory Medicine, Developmental
Biology, Oncology, Biological Engineering, etc.
Most of the studies, therefore, turn their efforts to the researches using
the cultivated cells (in vitro)
and/or such laboratory animals (in vivo),
so that the studies treating various functional biomolecules become the
mainstream in the biological and medical research fields of Life Sciences. It is beyond all doubt that this has earned current
medicine great progress and benefits.
However, the difficulty of application of the research products by means
of cell culture and of experimental animals such as mice to human health and the
risk that the biological mechanism subsisting in the experimental models
deviates from that in human tissues are recently suggested.
Revisiting the term “Biomedicine”, its principal
ideology can be found in Anatomy (structure) and Physiology (function). A variety of cells assembles with their
intents and unites with each other to construct elaborate tissues. The tissues are further organized into various
organs and individual body with the particular morphology affording their characteristic
functions: viz., the human cells succeed in fulfillment of human health by
formation of our peculiar three-dimensional (3D) structure under biological
actions of numerous biomolecules. From
this point of view, it goes without saying that the studies by use of human organs
and/or tissues are ideal for evolution of biomedical research, of which
essential mission is accurate exertion for accomplishment of the human health,
but, in fact, such studies are heavily restricted because of the ethical
problems. Therefore, the development of a
new medical research model equivalent to human tissue is recently required to
solve the issue. This is also regarded
to be an important ground for current project to develop organ-on-a-chip, which
is constructed with human cells and available as an organic model substitutable
for experimental animal. The human
tissue/organ model is further anticipated as biomaterials exploitable for
transplantation. Thus, the establishment
of artificial human 3D tissues/organs, which the cells form themselves through functions
of their produced biomolecules, probably afford effective means to accomplish
the ultimate goal of the future biomedical research.
At present, plenty of research institutes challenges the development of a variety of 3D human tissues and/or organs by good use of tissue engineering methodology not only for the progression of Biomedicine, but also for the application to medical transplantation. Considering application of the 3D tissues fabricated in ex vivo condition to medical research and transplantation, investment of biological regulatory system in the fabricated tissues is critically significant for their survival and function. Constitution of blood and lymphatic vasculature in the tissues is presumed to play a crucial role in preferential blood supply and drainage of tissue fluid and cells in the case of their transplantation and also in investigation of pathophysiological mechanism including tumor metastasis and drug discovery as a unique experimental model.
Assimilation of Biomedicine, of which tradition
has been rooted in strict Anatomy and Physiology, to some disciplines in such heterogeneous
fields as tissue engineering affords a novel scientific world, and it is intensely
desired that this journal will depict the future chart on Biomedical research.
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